Improvement in calendar-dials for clocks and watches



W. D. MOGLOGHLON. Calendar-Dial for G-100ks a.nd Watches.

No. 200,212. Patented Feb. 12,1878.

ETANDARDTI M E.

WAS HINGTON-VS- frzv/eni'ar:

Alan M,

@aea.

".FETERS PHOTO-LITHOQRAPHER. WASHINGTON, 0 c.

UNITED STATES PATENT OFFICE.

WILLIAM D. IWIGGLOGHLON, OF LONDON, ONTARIO, CAN ADA.

IMPROVEMENT IN CALENDAR-DIALS FOR CLOCKS ANDWATCH ES.

Specification forming part of Letters Patent No. 200,212, dated February12, 1878; application filed August 20, 1877.

To all whom it may concern:

Be it known that I, WILLIAM D. MGGLOGH- LON, of the city of London, inthe Province of Ontario, Dominion of Canada, have invented certain newand useful Improvements on WVatch and Clock Dial-Plates; and Therebydeclare that the following is a full, clear,

and exact description of the same, reference being had to theaccompanying drawings.

My invention consists of an adjustable calendar and mechanism foroperating the same, in combination with the dial-plate of a watch orclock, all as hereinafter fully described.

In Figure 1, Ais the dial, on which the hours and minutes are figured inthe ordinary manner. B O are'tables showing the exact time at variousselected localities, equated from the standard time marked by the clockor watch.

In the drawing only two rows of such equations are indicated; but anynumber may be more minutely engraved or otherwise displayed upon thedial.

D is the seconds-dial, in the center of which a circular plate, E, ispivoted, divided into seven spaces, each of which bears one of theinitial letters of the days of the week; and between this plate and theouter rim D figures corresponding to the days of the month are arranged,so that the plate E, on bein g properly set, acts as a calendar.

Fig. 2 shows the mechanism by which this calendar is regulated. F is aratchet, and Gr a ratchet-wheel, governed by spring-pawl H. The end ofthe ratchet F projects slightly beyond the edge of the dial, so that itmay be pushed sidewise, engaging with one of the teeth of the ratchet G,and moving it round so that the required letter of the week on the otherside of the plate E shall he opposite the proper date, when the pawlholds the ratchet in place and the calendar is setfor the whole month.

I is a distance chart or table, by which the distance in miles will beseen at a glance between the most important places in the world. Thischart may either be engraved or otherwise figured on the face of thedial, or contained in the case, as thought fit.

What I claim as my invention is The combination, with the dialplate of awatch or clock, of a revolving calendar-plate, E, and operatingmechanism, consisting of the ratchet and ratchet-wheel F G, andspringpawl H, said ratchet F projecting beyond the edge of thedial-plate, substantially as and for the purpose herein shown anddescribed.

W. D. MoGLOGHLON.

Witnesses HENRY BEECH, THOMAS BEECH.

